TOAST UI Editor : GFM Markdown Wysiwyg Editor

TOAST UI Editor provides Markdown mode and WYSIWYG mode.
Someone may like the productivity of Markdown, but the other can be looking for a way to make it easier to edit. The TOAST UI Editor can be the coordinator of both. It offers Markdown mode and WYSIWYG mode, those can be switched at any time during writing content. Work together conveniently in one document.